Seal the hive to keep in the vapour,normally with a foam bung at the entrance.Add the correct quantity of Oxalic Acid(as detailed on the container)to the cup of the vaporiser.Connect up to a 12V car battery and slip the cup of vaporiser into the centre of the hive through the entrance. Seal the entrance back up.Leave until all the oxalic acid has vaporised(a few minutes)and remove.Leave sealed up for a few more minutes and then remove the foam bung from the entrance.Product Name:Bee Medicine Fumigation It comes.Top Quality Vaporizer is made for a long-term service. These electric vaporizers are used for bee colonies treatment with the acid vapor(an acid of sorrel,formic acid).It is a perfect decision for the treatment of bee colonies in the hive with formic acid vapor or other medicines to create favorable conditions for them annually.Made of a aircraft stainless steel+wood Product weight:530g,Product specifications:12v150W,Product introduction:Export type bee is easy to use and easy to operate, Manufacturer: Fuhjythy